from tkinter import*

print("Введите начальную координату X:")
X=int(input())
print("Введите начальную координату Y:")
Y=int(input())
print("Введите начальную координату N:")
N=int(input())

coods = [0,0,10,0,10,10,20,10,20,20,10,20,10,30,0,30]
if N == 0 and X>=0 and X<=500 and Y>=0 and Y<=500:
    pass
else:
    if N > 0 and 0*N+X>=0 and 20*N+X <=500 and 20*N+Y<=500:
        pass
    else:
        print("Размер фигуры превышает максимальный размер поля")
        exit()
root = Tk()

canvas = Canvas (bg="white" , width=500, height=500)
canvas.pack(anchor=CENTER, expand=1)
canvas.create_polygon(coods[0] *N+X, coods[1] *N+Y,
                      coods[2] *N+X, coods[3] *N+Y,
                      coods[4] *N+X, coods[5] *N+Y,
                      coods[6] *N+X, coods[7] *N+Y,
                      coods[8] *N+X, coods[9] *N+Y,
                      coods[10] *N+X, coods[11] *N+Y,
                      coods[12] *N+X, coods[13] *N+Y,
                      coods[14] *N+X, coods[15] *N+Y)

root.mainloop()

